[INFO] fetching crate fakelogs 0.1.10-75501d4...
[INFO] testing fakelogs-0.1.10-75501d4 against master#c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38 for pr-146098-7
[INFO] extracting crate fakelogs 0.1.10-75501d4 into /workspace/builds/worker-0-tc1/source
[INFO] started tweaking crates.io crate fakelogs 0.1.10-75501d4
[INFO] finished tweaking crates.io crate fakelogs 0.1.10-75501d4
[INFO] tweaked toml for crates.io crate fakelogs 0.1.10-75501d4 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate fakelogs 0.1.10-75501d4 on toolchain c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate fakelogs 0.1.10-75501d4 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded c2-chacha v0.2.3
[INFO] [stderr]   Downloaded libc v0.2.66
[INFO] [stderr]   Downloaded chrono v0.4.10
[INFO] [stderr]   Downloaded ticker v0.1.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0c33366df3811615c00a6201dc5bdfdc505e944e920db514298af4f289ec4d67
[INFO] running `Command { std: "docker" "start" "-a" "0c33366df3811615c00a6201dc5bdfdc505e944e920db514298af4f289ec4d67", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0c33366df3811615c00a6201dc5bdfdc505e944e920db514298af4f289ec4d67", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0c33366df3811615c00a6201dc5bdfdc505e944e920db514298af4f289ec4d67", kill_on_drop: false }`
[INFO] [stdout] 0c33366df3811615c00a6201dc5bdfdc505e944e920db514298af4f289ec4d67
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6437f58940bbddf2bd82d0302bb641134fdea127ac505d1867e3f4947c99296f
[INFO] running `Command { std: "docker" "start" "-a" "6437f58940bbddf2bd82d0302bb641134fdea127ac505d1867e3f4947c99296f", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.66
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling ppv-lite86 v0.2.6
[INFO] [stderr]    Compiling ticker v0.1.1
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]    Compiling num-integer v0.1.42
[INFO] [stderr]    Compiling c2-chacha v0.2.3
[INFO] [stderr]    Compiling time v0.1.42
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling rand_chacha v0.2.1
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling chrono v0.4.10
[INFO] [stderr]    Compiling fakelogs v0.1.10-75501d4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/generator.rs:161:40
[INFO] [stdout]     |
[INFO] [stdout] 161 | pub fn write_common_log_header(w: &mut (dyn std::io::Write)) -> Result<usize, Error> {
[INFO] [stdout]     |                                        ^                  ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 161 - pub fn write_common_log_header(w: &mut (dyn std::io::Write)) -> Result<usize, Error> {
[INFO] [stdout] 161 + pub fn write_common_log_header(w: &mut dyn std::io::Write ) -> Result<usize, Error> {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/generator.rs:175:33
[INFO] [stdout]     |
[INFO] [stdout] 175 | pub fn write_csv_header(w: &mut (dyn std::io::Write)) -> Result<usize, Error> {
[INFO] [stdout]     |                                 ^                  ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 175 - pub fn write_csv_header(w: &mut (dyn std::io::Write)) -> Result<usize, Error> {
[INFO] [stdout] 175 + pub fn write_csv_header(w: &mut dyn std::io::Write ) -> Result<usize, Error> {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: `RefCell<LineWriter<std::io::stdio::StdoutRaw>>` cannot be shared between threads safely
[INFO] [stdout]   --> src/lib.rs:47:29
[INFO] [stdout]    |
[INFO] [stdout] 47 |             r = l.write_csv(handle.borrow_mut());
[INFO] [stdout]    |                             ^^^^^^^^^^^^^^^^^^^ `RefCell<LineWriter<std::io::stdio::StdoutRaw>>` cannot be shared between threads safely
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `Sync` is not implemented for `RefCell<LineWriter<std::io::stdio::StdoutRaw>>`
[INFO] [stdout]    = note: if you want to do aliasing and mutation between multiple threads, use `std::sync::RwLock` instead
[INFO] [stdout]    = note: required for `ReentrantLockGuard<'_, RefCell<LineWriter<std::io::stdio::StdoutRaw>>>` to implement `Sync`
[INFO] [stdout] note: required because it appears within the type `StdoutLock<'_>`
[INFO] [stdout]   --> /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/std/src/io/stdio.rs:640:11
[INFO] [stdout]    = note: required for the cast from `&mut StdoutLock<'_>` to `&mut dyn std::io::Write + Sync`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: `RefCell<LineWriter<std::io::stdio::StdoutRaw>>` cannot be shared between threads safely
[INFO] [stdout]   --> src/lib.rs:49:36
[INFO] [stdout]    |
[INFO] [stdout] 49 |             r = l.write_common_log(handle.borrow_mut());
[INFO] [stdout]    |                                    ^^^^^^^^^^^^^^^^^^^ `RefCell<LineWriter<std::io::stdio::StdoutRaw>>` cannot be shared between threads safely
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `Sync` is not implemented for `RefCell<LineWriter<std::io::stdio::StdoutRaw>>`
[INFO] [stdout]    = note: if you want to do aliasing and mutation between multiple threads, use `std::sync::RwLock` instead
[INFO] [stdout]    = note: required for `ReentrantLockGuard<'_, RefCell<LineWriter<std::io::stdio::StdoutRaw>>>` to implement `Sync`
[INFO] [stdout] note: required because it appears within the type `StdoutLock<'_>`
[INFO] [stdout]   --> /rustc/c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38/library/std/src/io/stdio.rs:640:11
[INFO] [stdout]    = note: required for the cast from `&mut StdoutLock<'_>` to `&mut dyn std::io::Write + Sync`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `fakelogs` (lib) due to 2 previous errors; 2 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "6437f58940bbddf2bd82d0302bb641134fdea127ac505d1867e3f4947c99296f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6437f58940bbddf2bd82d0302bb641134fdea127ac505d1867e3f4947c99296f", kill_on_drop: false }`
[INFO] [stdout] 6437f58940bbddf2bd82d0302bb641134fdea127ac505d1867e3f4947c99296f